They are similar because they are all exposed to the surface and they are all types of mining.
Opencast mining involves extracting minerals from an open pit, while shaft mining involves digging tunnels or shafts deep underground to access mineral deposits. Opencast mining is typically used for shallow mineral deposits, whereas shaft mining is used for deeper deposits that cannot be easily accessed from the surface.
Surface mining is used when mineral deposits are close to the surface, making it more cost-effective and efficient to extract them using methods like open-pit mining. Subsurface mining is employed when mineral deposits are buried deep underground, necessitating techniques such as shaft mining or drift mining to access them. The choice between surface and subsurface mining depends on factors such as the depth and location of the mineral deposits, environmental considerations, and cost-effectiveness.
A deep hole dug for mining is called a shaft. It provides access to underground mineral deposits for extraction and transportation to the surface. shafts can extend vertically or at an angle depending on the depth and layout of the mine.
Slope mining is a method of accessing valuable geological material, such as coal. A sloping access shaft travels downwards towards the coal seam. Slope mines differ from shaft and drift mines, which access resources by tunneling straight down or horizontally, respectively.
Gold mining typically involves both surface mining and underground mining. Initially, surface mining techniques such as panning, sluicing, and dredging are used to extract gold from shallow deposits. As the easier-to-access gold becomes depleted, underground mining methods like shaft mining and drift mining are employed to access deeper ore deposits.
They are similar because they all are types of mining, and they all are exposed to the surface.
Shaft mining or strip mining.
Opencast mining involves extracting minerals from an open pit, while shaft mining involves digging tunnels or shafts deep underground to access mineral deposits. Opencast mining is typically used for shallow mineral deposits, whereas shaft mining is used for deeper deposits that cannot be easily accessed from the surface.
They all involve the mechanized removal of rock.
There are some technological methods that are used in mining are:Open-cast mining : Open-cast mining is done when a mineral is located very close to the surface. In the open-cast mining, different minerals are taken out by removing the surface layer. Open-cast mining is famous for coal mining in India and many other countries.Shaft mining : The word 'shaft' refers to deep bores. In the shaft mining, deep bores are created to reach mineral deposits. This is because, these deposits lie at great depths. Petroleum and natural gas are extracted by shaft mining.
Surface mining is used when mineral deposits are close to the surface, making it more cost-effective and efficient to extract them using methods like open-pit mining. Subsurface mining is employed when mineral deposits are buried deep underground, necessitating techniques such as shaft mining or drift mining to access them. The choice between surface and subsurface mining depends on factors such as the depth and location of the mineral deposits, environmental considerations, and cost-effectiveness.
A deep hole dug for mining is called a shaft. It provides access to underground mineral deposits for extraction and transportation to the surface. shafts can extend vertically or at an angle depending on the depth and layout of the mine.
Slope mining is a method of accessing valuable geological material, such as coal. A sloping access shaft travels downwards towards the coal seam. Slope mines differ from shaft and drift mines, which access resources by tunneling straight down or horizontally, respectively.
Gold mining typically involves both surface mining and underground mining. Initially, surface mining techniques such as panning, sluicing, and dredging are used to extract gold from shallow deposits. As the easier-to-access gold becomes depleted, underground mining methods like shaft mining and drift mining are employed to access deeper ore deposits.
Shallow coal deposits in the US and other countries are often removed by surface mining, also known as strip mining. The soil atop the seam is removed, then replaced after the coal has been removed. This can be very disruptive to the local ecology.In India and other countries, open pit or "open cast" mines may be used to mine deep deposits that are accessible from the surface. This process is widely used for metal ores worldwide. However, the traditional process for deep subterranean coal seams is to create vertical shaft mines that do not remove the surface burden.
Deep shaft mining is a method of extracting minerals and resources from deep underground by digging vertically downward, creating a shaft that allows miners and equipment to access the deposits. This method is commonly used for accessing resources such as coal, gold, and copper that are located deep beneath the Earth's surface.
The types of mining are shaft mining, strip mining, surface mining, and subsurface mining.